skill from weapon not showing up

[Riggs]

Platform: Windows 7
ISP: Plus Net
Type of Internet Connection: Broadband
Internet Connection Speed: 2mbit/sec
Date & Time: 12th August 2013 at 9:30pm gmt+1
Frequency: Always
Character Name: Riggs
Race: ElvaanM
World: carbuncle
Main Job: Thief
Support Job: Dancer
Area and Coordinates: Western Adoulin
Party or Solo: Solo
NPC Name: n/a
Monster Name: n/a
Steps:
1. I purchased a Aphotic Kukri for 30k plasma
2. 1 upgraded it with 12 +1 aux and 5 standard
3. I then equipped the dagger in my main hand and checked my stats
4. My parry skill had increased by 166 but my dagger skill had not increased at all.
5. I tried it with out dual weild, in off hand and with different weapons, the dagger skill did not increase.
6. when i tried the dagger out side town my level 95 Mandau in off hand was doing more damage than the Aphotic Kukri in my main hand
<*Add more steps if necessary.>